EDITORIAL pubs.acs.org/JPCL
Expanding the Dimensions of Molecular Spectroscopy results of Wasielewski and co-workers3 probe chargetransfer excitations in donor-acceptor molecules on the subpicosecond time scale, providing new insight into photoinduced electron transfer. We hope to see the pages of JPC Letters filled with other ground-breaking work in the field of molecular spectroscopy.
Molecular spectroscopy has a rich tradition of accomplishment founded primarily in measurements of single-photon transitions probed in the frequency domain. In the gas phase, the push toward higher resolution is finding impetus from the high information content available to eigenstate-resolved methods, girded on by recent advances in light sources such as frequency combs with extraordinary resolution. In solution, the spectral complexity and inhomogeneous broadening associated with measurements on large molecules have fueled interest in multidimensional optical methods involving pulse sequences with close analogues in NMR. These powerful new methods are finding an ever-widening array of applications, with new pulse sequences designed to extract information on the vibrational or electronic couplings of most relevance to a particular sample.
We hope to see the pages of JPC Letters filled with other groundbreaking work in the field of molecular spectroscopy. Timothy S. Zwier Senior Editor
Molecular spectroscopy has a rich tradition of accomplishment founded primarily in measurements of single-photon transitions probed in the frequency domain.
Purdue University, West Lafayette, Indiana
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In this issue, the Perspective written by J. C. Wright and coworkers1 highlights a subset of coherent multidimensional spectroscopy methods that show particular promise for their application to materials. The article is pedagogically written so that those outside of the field can better understand and appreciate the types of information available from such measurements. Experiments carried out on a model dicarbonyl infrared chromophore provide clear illustration of the spectral patterns which result and give a physically intuitive theoretical framework in which to understand various multiresonant versions of the methods. The Perspective ends with a description of the application of these methods particularly to problems in materials science. Electron-transfer processes are used as illustration, where the unique combination of selectivity and fast time probing available to multiply resonant coherent spectroscopy will be put to particularly good use in sorting out the intricate pathways and strong couplings involved in electron transfer in complex materials. More generally, in the first issues of the journal, several Letters have highlighted research in which molecular spectroscopy has played a key role. Among them are two articles that probe excited electronic states via advanced Raman techniques. Bykov and Asher2 demonstrate that deep-UV resonance Raman can be used to determine the conformational distributions of individual peptide bonds in an oligoglycine. The femtosecond stimulated Raman
r 2010 American Chemical Society
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Pakoulev, A. V.; Block, S. B.; Yurs, L. A.; Mathew, N. A.; Kornau, K. M.; Wright, J. C., Multiply Resonant Coherent Multidimensional Spectroscopy: Implications for Materials Science. J. Phys. Chem. Lett. 2010, 1, 822-828. Bykov, S. V.; Asher, S. A. UV Resonance Raman Elucidation of the Terminal and Internal Peptide Bond Conformations of Crystalline and Solution Oligoglycines. J. Phys. Chem. Lett. 2010, 1, 269–271. Lockard, J. V.; Ricks, A. B.; Co, D. T.; Wasielewski, M. R. Interrogating the Intramolecular Charge-Transfer State of a Julolidine-Anthracene Donor-Acceptor Molecules with Femtosecond Stimulated Raman Spectroscopy. J. Phys. Chem. Lett. 2010, 1, 215–218.
Received Date: February 2, 2010 Accepted Date: February 2, 2010 Published on Web Date: March 04, 2010
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DOI: 10.1021/jz100140q |J. Phys. Chem. Lett. 2010, 1, 873–873
